]>
git.proxmox.com Git - mirror_edk2.git/blob - MdePkg/Library/BasePrintLib/PrintLibInternal.c
2 Print Library worker functions.
4 Copyright (c) 2006, Intel Corporation<BR>
5 All rights reserved. This program and the accompanying materials
6 are licensed and made available under the terms and conditions of the BSD License
7 which accompanies this distribution. The full text of the license may be found at
8 http://opensource.org/licenses/bsd-license.php
10 THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
11 WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
13 Module Name: PrintLibInternal.c
17 #include "PrintLibInternal.h"
19 static CONST CHAR8 mHexStr
[] = {'0','1','2','3','4','5','6','7','8','9','A','B','C','D','E','F'};
23 Internal function that places the character into the Buffer.
25 Internal function that places ASCII or Unicode character into the Buffer.
27 @param Buffer Buffer to place the Unicode or ASCII string.
28 @param Length Count of character to be placed into Buffer.
29 @param Character Character to be placed into Buffer.
30 @param Increment Character increment in Buffer.
32 @return Number of characters printed.
36 BasePrintLibFillBuffer (
45 for (Index
= 0; Index
< Length
; Index
++) {
46 *Buffer
= (CHAR8
) Character
;
47 *(Buffer
+ 1) = (CHAR8
) (Character
>> 8);
54 Internal function that convert a decimal number to a string in Buffer.
56 Print worker function that convert a decimal number to a string in Buffer.
58 @param Buffer Location to place the Unicode or ASCII string of Value.
59 @param Value Value to convert to a Decimal or Hexidecimal string in Buffer.
60 @param Radix Radix of the value
62 @return Number of characters printed.
67 BasePrintLibValueToString (
77 // Loop to convert one digit at a time in reverse order
82 Value
= (INT64
)DivU64x32Remainder ((UINT64
)Value
, (UINT32
)Radix
, &Remainder
);
83 *(Buffer
++) = mHexStr
[Remainder
];
90 Internal function that converts a decimal value to a Null-terminated string.
92 Converts the decimal number specified by Value to a Null-terminated
93 string specified by Buffer containing at most Width characters.
94 If Width is 0 then a width of MAXIMUM_VALUE_CHARACTERS is assumed.
95 The total number of characters placed in Buffer is returned.
96 If the conversion contains more than Width characters, then only the first
97 Width characters are returned, and the total number of characters
98 required to perform the conversion is returned.
99 Additional conversion parameters are specified in Flags.
100 The Flags bit LEFT_JUSTIFY is always ignored.
101 All conversions are left justified in Buffer.
102 If Width is 0, PREFIX_ZERO is ignored in Flags.
103 If COMMA_TYPE is set in Flags, then PREFIX_ZERO is ignored in Flags, and commas
104 are inserted every 3rd digit starting from the right.
105 If Value is < 0, then the fist character in Buffer is a '-'.
106 If PREFIX_ZERO is set in Flags and PREFIX_ZERO is not being ignored,
107 then Buffer is padded with '0' characters so the combination of the optional '-'
108 sign character, '0' characters, digit characters for Value, and the Null-terminator
109 add up to Width characters.
111 If Buffer is NULL, then ASSERT().
112 If unsupported bits are set in Flags, then ASSERT().
113 If Width >= MAXIMUM_VALUE_CHARACTERS, then ASSERT()
115 @param Buffer Pointer to the output buffer for the produced Null-terminated
117 @param Flags The bitmask of flags that specify left justification, zero pad,
119 @param Value The 64-bit signed value to convert to a string.
120 @param Width The maximum number of characters to place in Buffer.
121 @param Increment Character increment in Buffer.
123 @return Total number of characters required to perform the conversion.
127 BasePrintLibConvertValueToString (
128 IN OUT CHAR8
*Buffer
,
135 CHAR8
*OriginalBuffer
;
136 CHAR8 ValueBuffer
[MAXIMUM_VALUE_CHARACTERS
];
141 ASSERT (Buffer
!= NULL
);
142 ASSERT (Width
< MAXIMUM_VALUE_CHARACTERS
);
144 // Make sure Flags can only contain supported bits.
146 ASSERT ((Flags
& ~(LEFT_JUSTIFY
| COMMA_TYPE
| PREFIX_ZERO
)) == 0);
148 OriginalBuffer
= Buffer
;
150 if (Width
== 0 || (Flags
& COMMA_TYPE
) != 0) {
151 Flags
&= (~PREFIX_ZERO
);
155 Width
= MAXIMUM_VALUE_CHARACTERS
- 1;
160 Buffer
= BasePrintLibFillBuffer (Buffer
, 1, '-', Increment
);
163 Count
= BasePrintLibValueToString (ValueBuffer
, Value
, 10);
165 if ((Flags
& PREFIX_ZERO
) != 0) {
166 Buffer
= BasePrintLibFillBuffer (Buffer
, Width
- Count
, '0', Increment
);
169 Digits
= 3 - (Count
% 3);
170 for (Index
= 0; Index
< Count
; Index
++) {
171 Buffer
= BasePrintLibFillBuffer (Buffer
, 1, ValueBuffer
[Count
- Index
], Increment
);
172 if ((Flags
& COMMA_TYPE
) != 0) {
176 if ((Index
+ 1) < Count
) {
177 Buffer
= BasePrintLibFillBuffer (Buffer
, 1, ',', Increment
);
183 Buffer
= BasePrintLibFillBuffer (Buffer
, 1, 0, Increment
);
185 return ((Buffer
- OriginalBuffer
) / Increment
);